Improvement in converting motion



UNITED STATES PATENT EEIGEc JAMES VIVIAN AND HENRY S. MAOKENZIE, OF EALMOUTH, ENGLAND.,

IMPROVEMENT IN CONVERTING MOTION.

Specification forming part of Letters Patent No. 149,696., dated April 14, 1874; application filed October 10, 1873.

To all whom lt may concern:

Be it known that we, JAMES VivIAN and HENRY SOMERSET MAGKENZIE, of Falmouth, in the county of Cornwall, England, have invented a new and useful Improvement in Gonverting Motion; and we do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing, forming a part of this specication, in Which- Figure lis a longitudinal vertical section. Fig. 2 is a cross-section in line x x of Fi g. l.

The invention relates to meanswhereby two screW-propellers on the same shaft may be conveniently rotated in the same or opposite directions.

It will be first fully described and then pointed out in the claim.

'A represents a shaft to which is rigidly attached the screwpropeller B 5 and A', a sleeve on which is made fast a second propeller, B', 4

and which is itself loose on shaft A. G C' are two wheels, one fast on shaft A, and the other on sleeve A', having, respectively, the wristpins c c placed on their opposite faces, and each pivoted in the sliding blocks c' c'. D is the piston, which is bifurcated to straddle the shaft, and provided with the confined guideboxes el d, placed side by side, and formed by plates ell l1 and a partition, cl2. In these boxes the wrist-pin blocks c' c' slide from one end to the other at each half-revolution of shaft A, going back on the second half-revolution. l1' these blocks are on the same side of the shaft A when the piston is operated the propellers will both move in the sanie direction, while if placed on opposite sides they will be carried in reverse directions. E E are eyes on the box-plate, which slide up and down on guides E F to confine the motion of vthe piston to a right line. l

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is

The combination of the propeller-shaft A, loose propeller-sleeve A', and their respective cranlnwheels C C', having opposite wrist-pins c c, with the swiveled blocks c' c', and the tracks cl cl of the reciprocating piston D, as and for the purpose described.

The above specification signed by us this 22d day of January, 1873.

JAMES VIVIAN. L. s.] E. SOMERSET MAGKENZIE. L. s]

WVitnesses J. ALLEN TREeELLEs,

Architect, Falmouth. v W. GEEGG,

Clerk to Mr. J. A. Trey/elles. 

